How to Build Waterproof Under Deck Storage?

How to Build Waterproof Under Deck Storage?

Stafford, VA is home to many beautiful homes with expansive decks. But what many homeowners don't realize is the potential of the space beneath their decks. As experts in decks, railings, and porches in Stafford, VA, we at Arca Construction have the perfect solution: waterproof under-deck storage.

Why Waterproof Under Deck Storage?

The space under your deck can be a goldmine for storage. Whether it's garden tools, seasonal items, or even outdoor toys for the kids, this space can keep them organized and protected from the elements. But the key is to ensure it's waterproof so that you don't lose your extra entertainment space. After all, the last thing you want is to find your belongings soaked after a heavy rain.

Step-by-Step Guide to Building Waterproof Under Deck Storage

1. Assess the Space

Before you start, take a good look at the space beneath your deck. Find out if Is it sloped before building your deck on the slope. How much headroom do you have? This will determine the type of storage you can build.

2. Install a Waterproof Barrier

Begin by installing a waterproof barrier beneath the deck boards. This will direct water away from the storage area. You can use a rubberized membrane or even a simple tarp, ensuring it slopes away from the house.

3. Frame the Storage Area

Using pressure-treated wood, frame out your storage area. Ensure you leave space for doors or access panels. Remember, the goal is to keep water out, so ensure the frame is tight and secure.

4. Choose the Right Flooring

While the barrier will direct most of the water away, having a waterproof floor is still essential. Consider using composite decking or even concrete slabs. Ensure there's a slight slope to direct any water away from the storage area.

5. Install the Doors

Whether you choose sliding doors, swing-out doors, or even a simple access panel, ensure they're waterproof. Consider using weather stripping to seal any gaps.

6. Ventilation is Key

While you want to keep water out, it's essential to let air in. Install vents at the top and bottom of your storage area. This will prevent mold and mildew from forming.

7. Organize Your Storage

Now that your waterproof storage is ready, it's time to organize. Consider installing shelves, hooks, or even storage bins. Remember, the goal is to keep things dry and organized.

Benefits of Waterproof Under Deck Storage

  • Protection from Elements: Your belongings are safe from rain, snow, and even the hot Stafford sun.
  • Increased Home Value: A waterproof storage solution can increase your home's value. Potential buyers will appreciate the extra storage space.
  • Aesthetically Pleasing: Instead of looking at an open space beneath your deck, you now have a neat and organized storage solution.


Building waterproof under-deck storage is a practical and valuable addition to any home in Stafford, VA. Not only does it provide extra storage space, but it also protects your belongings from the elements. As experts in deck construction, we at Arca Construction understand the importance of maximizing every inch of your outdoor space. If you want to explore more innovative solutions for your deck, contact us today! Learn with us how to install composite decking with hidden fasteners.

Ready to Maximize Your Outdoor Space?

Don't let the space beneath your deck go to waste. Transform it into a functional and waterproof storage area with the expertise of Arca Construction. As Stafford, VA's leading deck and porch experts, we're here to help you make the most of every inch of your property. Contact Arca Construction Today and Elevate Your Outdoor Living Experience!